jenkins docs say: "Both the nocanon option to ProxyPass, and AllowEncodedSlashes NoDecode, are required for certain Jenkins features to work."

Apache docs say: "Normally, mod_proxy will canonicalise ProxyPassed URLs. But this may be incompatible with some backends, particularly those that make use of PATH_INFO. The optional nocanon keyword suppresses this and passes the URL path "raw" to the backend. Note that this keyword may affect the security of your backend, as it removes the normal limited protection against URL-based attacks provided by the proxy."

It is now available from https://integration.wikimedia.org/ci/blue/ There are surely a few things we want to tweak here and there. Potentially we could then make Zuul to point the console logs to that new skin?